Such measures of inflation as the consumer price index can also be used to compare prices in different regions. A standardized "basket" of grocery or consumer items can be purchased in different cities and stores, and their prices compared. Suppose that 51 stores are randomly selected, from all grocery and convenience stores in the four cities shown that charged over $90 for a standard basket of consumer goods. At the 0.05 level of significance, test the claim that stores charging over $90 for the same grocery and convenience items are found in equal numbers in the four cities.
City 
St. John's 
Moncton 
Regina 
Victoria 
Number 
20 
3 
11 
17